Easy Video Sharpener

About

"It's really helping my old eyes! 👀"

New version! Fixes in version 1.5.0:

    Bug #1: Unique SVG gradient IDs per overlay
    Bug #2: Slider max/step values aligned (strength: 7/0.05, blur: 2/0.05)
    Bug #3: trackedVideos.size replaces manual counter
    Dead code removed (log, FILTER_IMPL, LEGACY_KERNELS)
    Fixed SVG filter injection deduplicated
    Fixed settings change handler deduplicated
    Fixed set-based video dedup
    Improved Reddit scanning
    Disconnected video cleanup in scanForVideos
    Typography upgrade (Segoe UI Variable, Cascadia Code), refined palette

Features

    Fast SVG sharpening filter — avoids performance issues
    Works on most sites — YouTube, streaming sites, and any HTML5 video
    In-player mini UI — control sharpening without leaving the video
    Toolbar popup — quick access from the browser toolbar
    Custom mode — fine-tune Strength and Blur parameters manually
    Lock sliders — preserve your custom values when changing preset levels

How to Use

In-player UI (recommended):

    Hold Shift and move your mouse onto the video to show the control panel
    Release Shift, then use the toggle and sliders to adjust sharpening
    Move your mouse off the panel to hide it (hides after ~1 second)

Preset Levels (1–10):

Quick sharpening presets from subtle (1) to aggressive (10). The slider automatically calculates optimal Strength and Blur values.

Custom Mode:

Enable the Custom toggle to access manual controls:

    Strength (0.00 – 7.00): Sharpening intensity — higher values mean sharper edges
    Blur (0.00 – 2.00): Blur radius for the unsharp mask — affects halo size around edges

Lock Buttons:

Click the padlock icon next to Strength or Blur to lock that value. Locked sliders won't change when you adjust the preset level slider. This lets you find your perfect Blur, then experiment with different Strength values (or vice versa).

Privacy

This extension does not collect or transmit any user data. All settings are stored locally in your browser.

Permissions

    storage — Saves your settings locally (enabled state, level, custom values, lock states)

Technical Details

The sharpening uses an unsharp mask algorithm implemented as an SVG filter:

    Apply Gaussian blur to source
    Subtract blurred image from original
    Result enhances edges while preserving smooth areas

GPU-accelerated for smooth performance.

If you find this addon useful, consider buying me a coffee:
https://www.paypal.com/donate/?hosted_button_id=AQRBMA2J69R6N ☕❤️